Lecture 7: How do we taste, chew and swallow? Flashcards
1
Q
Where does the GI tract start and finish?
A
Starts at the oral cavity and ends at the anus
2
Q
What are the functions of the oral cavity? (4)
A
- Sensing
- Salivation
- Chewing
- Initiating swallowing
3
Q
What are the functions of the pharynx? (3)
A
- Defence against infection (tonsils)
- Swallowing
- Airway protection
4
Q
What is the function of the oesophagus?
A
Transport from pharynx to stomach
5
Q
What are the functions of the stomach and small intestine? (3)
A
- Transit
- Defence against infection (acid)
- Digestion and absorption (Helped by the accessory organs of the GI tract)
6
Q
What are the functions of the large intestine and anus? (4)
A
- Transit
- Reabsorption of H2O and electrolytes
- Stool formation
- Waste excretion
7
Q
What parts of the GI tract make up the Upper GI tract? (6)
A
- Oral cavity
- Oropharynx
- Laryngopharynx
- Oesophagus
- Stomach
- Small intestine
8
Q
Which parts of the GI tract make up the lower GI tract? (6)
A
- Caecum
- Appendix
- Colon
- Rectum
- Anal canal
- Anus
9
Q
What are the dangers faced by the upper GI tract? (5)
A
- Poisons
- Sharp or excessively hot/cold substances
- Bacteria/viruses
- Obstructions in the upper GI tract
- Inhalation of substances (Aspiration) into GI tract
